1. Department of Gastroenterology Cancer Institute Hospital, Japanese Foundation for Cancer Research Tokyo Japan
2. Department of Gastroenterology and Internal Medicine Hayashi Clinic Suita Japan
3. Department of Gastroenterology Toyonaka Municipal Hospital Toyonaka Japan
4. Department of Gastroenterology Tane General Hospital Osaka Japan
5. Department of Gastroenterology and Hepatology Osaka General Medical Center Osaka Japan
6. Department of Hepatobiliary and Pancreatic Oncology Osaka International Cancer Institute Osaka Japan
7. Department of Gastroenterology and Hepatology Suita Municipal Hospital Osaka Japan
8. Department of Gastroenterology, Fukushima Medical University School of Medicine Fukushima Japan
9. Department of Gastroenterology Graduate School of Medicine, Juntendo University Tokyo Japan
10. Department of Gastroenterology and Hepatology Osaka Rosai Hospital Sakai Japan
11. Department of Gastroenterological Oncology Hyogo Cancer Center Akashi Japan
12. Division of Gastroenterology and Hepatology, Department of Internal Medicine Toho University Ohashi Medical Center Tokyo Japan
13. Department of Gastroenterology and Metabolism Nagoya City University Graduate School of Medical Sciences Nagoya Japan
14. Department of Gastroenterology Tonan Hospital Sapporo Japan
15. Department of Gastroenterology Ishikawa Prefectural Central Hospital Kanazawa Japan
16. Department of Gastroenterology, National Hospital Organization Kure Medical Center and Chugoku Cancer Center Kure Japan
17. Department of Gastroenterology Japanese Red Cross Medical Center Tokyo Japan
18. Department of Gastroenterology Fukui Prefectural Hospital Fukui Japan
19. Department of Gastroenterology and Hepatology, Faculty of Medicine Kindai University Ōsakasayama Japan
20. Department of Gastroenterology and Hepatology Digestive Disease Center, Kitano Hospital, Tazuke Kofukai Medical Research Institute Osaka Japan
21. Department of Gastroenterology and Hepatology Kansai Rosai Hospital Amagasaki Japan
22. Department of Gastroenterology Osaka City University Graduate School of Medicine Osaka Japan
23. First Department of Internal Medicine Gifu University Hospital Gifu Japan